mirror of
https://gitlab.com/gaelysam/mapgen_rivers.git
synced 2024-12-29 12:20:41 +01:00
Fixed map centering, and converted polygon coordinates to map nodes instead of grid nodes.
This commit is contained in:
Gael-de-Sailly
parent
d5cf4a6267
commit
faef1658a9
@ -30,7 +30,7 @@ local function heightmaps(minp, maxp)
|
||||
local poly = polygons[i]
|
||||
|
||||
if poly then
|
||||
local xf, zf = transform_quadri(poly.x, poly.z, x/blocksize, z/blocksize)
|
||||
local xf, zf = transform_quadri(poly.x, poly.z, x, z)
|
||||
local i00, i01, i11, i10 = unpack(poly.i)
|
||||
|
||||
-- Load river width on 4 edges and corners
|
||||
|
||||
64
polygons.lua
64
polygons.lua
@ -59,11 +59,11 @@ end
|
||||
local blocksize = mapgen_rivers.blocksize
|
||||
local min_catchment = mapgen_rivers.min_catchment
|
||||
local max_catchment = mapgen_rivers.max_catchment
|
||||
local map_offset, map_offset_blocks
|
||||
local center = mapgen_rivers.center
|
||||
if center then
|
||||
map_offset = {x=math.floor(X/2), z=math.floor(Z/2)}
|
||||
map_offset_blocks = {x=map_offset.x/blocksize, z=map_offset.z/blocksize}
|
||||
|
||||
local map_offset = {x=0, z=0}
|
||||
if mapgen_rivers.center then
|
||||
map_offset.x = blocksize*X/2
|
||||
map_offset.z = blocksize*Z/2
|
||||
end
|
||||
|
||||
-- Width coefficients: coefficients solving
|
||||
@ -95,11 +95,8 @@ local init = false
|
||||
-- On map generation, determine into which polygon every point (in 2D) will fall.
|
||||
-- Also store polygon-specific data
|
||||
local function make_polygons(minp, maxp)
|
||||
if center then
|
||||
minp = {x=minp.x+map_offset.x, z=minp.z+map_offset.z}
|
||||
maxp = {x=maxp.x+map_offset.x, z=maxp.z+map_offset.z}
|
||||
map_offset_x_blocks = map_offset.x / blocksize
|
||||
end
|
||||
print("Generating polygon map")
|
||||
print(minp.x, maxp.x, minp.z, maxp.z)
|
||||
|
||||
if not init then
|
||||
if glaciers then
|
||||
@ -112,8 +109,9 @@ local function make_polygons(minp, maxp)
|
||||
|
||||
local polygons = {}
|
||||
-- Determine the minimum and maximum coordinates of the polygons that could be on the chunk, knowing that they have an average size of 'blocksize' and a maximal offset of 0.5 blocksize.
|
||||
local xpmin, xpmax = math.max(math.floor(minp.x/blocksize - 0.5), 0), math.min(math.ceil(maxp.x/blocksize), X-2)
|
||||
local zpmin, zpmax = math.max(math.floor(minp.z/blocksize - 0.5), 0), math.min(math.ceil(maxp.z/blocksize), Z-2)
|
||||
local xpmin, xpmax = math.max(math.floor((minp.x+map_offset.x)/blocksize - 0.5), 0), math.min(math.ceil((maxp.x+map_offset.x)/blocksize + 0.5), X-2)
|
||||
local zpmin, zpmax = math.max(math.floor((minp.z+map_offset.z)/blocksize - 0.5), 0), math.min(math.ceil((maxp.z+map_offset.z)/blocksize + 0.5), Z-2)
|
||||
print(xpmin, xpmax, zpmin, zpmax)
|
||||
|
||||
-- Iterate over the polygons
|
||||
for xp = xpmin, xpmax do
|
||||
@ -123,14 +121,27 @@ local function make_polygons(minp, maxp)
|
||||
local iC = index(xp+1, zp+1)
|
||||
local iD = index(xp, zp+1)
|
||||
-- Extract the vertices of the polygon
|
||||
local poly_x = {offset_x[iA]+xp, offset_x[iB]+xp+1, offset_x[iC]+xp+1, offset_x[iD]+xp}
|
||||
local poly_z = {offset_z[iA]+zp, offset_z[iB]+zp, offset_z[iC]+zp+1, offset_z[iD]+zp+1}
|
||||
local poly_x = {
|
||||
(offset_x[iA]+xp) * blocksize - map_offset.x,
|
||||
(offset_x[iB]+xp+1) * blocksize - map_offset.x,
|
||||
(offset_x[iC]+xp+1) * blocksize - map_offset.x,
|
||||
(offset_x[iD]+xp) * blocksize - map_offset.x,
|
||||
}
|
||||
local poly_z = {
|
||||
(offset_z[iA]+zp) * blocksize - map_offset.z,
|
||||
(offset_z[iB]+zp) * blocksize - map_offset.z,
|
||||
(offset_z[iC]+zp+1) * blocksize - map_offset.z,
|
||||
(offset_z[iD]+zp+1) * blocksize - map_offset.z,
|
||||
}
|
||||
if xp==xpmin and zp==zpmin then
|
||||
print(xp, zp, poly_x[1], poly_z[1])
|
||||
end
|
||||
local polygon = {x=poly_x, z=poly_z, i={iA, iB, iC, iD}}
|
||||
|
||||
local bounds = {} -- Will be a list of the intercepts of polygon edges for every Z position (scanline algorithm)
|
||||
-- Calculate the min and max Z positions
|
||||
local zmin = math.max(math.floor(blocksize*math.min(unpack(poly_z)))+1, minp.z)
|
||||
local zmax = math.min(math.floor(blocksize*math.max(unpack(poly_z))), maxp.z)
|
||||
local zmin = math.max(math.floor(math.min(unpack(poly_z)))+1, minp.z)
|
||||
local zmax = math.min(math.floor(math.max(unpack(poly_z))), maxp.z)
|
||||
-- And initialize the arrays
|
||||
for z=zmin, zmax do
|
||||
bounds[z] = {}
|
||||
@ -140,13 +151,13 @@ local function make_polygons(minp, maxp)
|
||||
for i2=1, 4 do -- Loop on 4 edges
|
||||
local z1, z2 = poly_z[i1], poly_z[i2]
|
||||
-- Calculate the integer Z positions over which this edge spans
|
||||
local lzmin = math.floor(blocksize*math.min(z1, z2))+1
|
||||
local lzmax = math.floor(blocksize*math.max(z1, z2))
|
||||
local lzmin = math.floor(math.min(z1, z2))+1
|
||||
local lzmax = math.floor(math.max(z1, z2))
|
||||
if lzmin <= lzmax then -- If there is at least one position in it
|
||||
local x1, x2 = poly_x[i1], poly_x[i2]
|
||||
-- Calculate coefficient of the equation defining the edge: X=aZ+b
|
||||
local a = (x1-x2) / (z1-z2)
|
||||
local b = blocksize*(x1 - a*z1)
|
||||
local b = (x1 - a*z1)
|
||||
for z=math.max(lzmin, minp.z), math.min(lzmax, maxp.z) do
|
||||
-- For every Z position involved, add the intercepted X position in the table
|
||||
table.insert(bounds[z], a*z+b)
|
||||
@ -176,13 +187,6 @@ local function make_polygons(minp, maxp)
|
||||
polygon.dem = poly_dem
|
||||
polygon.lake = math.min(lakes[iA], lakes[iB], lakes[iC], lakes[iD])
|
||||
|
||||
if center then
|
||||
for i=1, 4 do
|
||||
poly_x[i] = poly_x[i] - map_offset_blocks.x
|
||||
poly_z[i] = poly_z[i] - map_offset_blocks.z
|
||||
end
|
||||
end
|
||||
|
||||
-- Now, rivers.
|
||||
-- Load river flux values for the 4 corners
|
||||
local riverA = river_width(rivers[iA])
|
||||
@ -190,16 +194,16 @@ local function make_polygons(minp, maxp)
|
||||
local riverC = river_width(rivers[iC])
|
||||
local riverD = river_width(rivers[iD])
|
||||
if glaciers then -- Widen the river
|
||||
if get_temperature(poly_x[1]*blocksize, poly_dem[1], poly_z[1]*blocksize) < 0 then
|
||||
if get_temperature(poly_x[1], poly_dem[1], poly_z[1]) < 0 then
|
||||
riverA = math.min(riverA*glacier_factor, 1)
|
||||
end
|
||||
if get_temperature(poly_x[2]*blocksize, poly_dem[2], poly_z[2]*blocksize) < 0 then
|
||||
if get_temperature(poly_x[2], poly_dem[2], poly_z[2]) < 0 then
|
||||
riverB = math.min(riverB*glacier_factor, 1)
|
||||
end
|
||||
if get_temperature(poly_x[3]*blocksize, poly_dem[3], poly_z[3]*blocksize) < 0 then
|
||||
if get_temperature(poly_x[3], poly_dem[3], poly_z[3]) < 0 then
|
||||
riverC = math.min(riverC*glacier_factor, 1)
|
||||
end
|
||||
if get_temperature(poly_x[4]*blocksize, poly_dem[4], poly_z[4]*blocksize) < 0 then
|
||||
if get_temperature(poly_x[4], poly_dem[4], poly_z[4]) < 0 then
|
||||
riverD = math.min(riverD*glacier_factor, 1)
|
||||
end
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue
Block a user